Pulverizing machine



Sept. 4, 2 1,683,304y 19 8 E. T. RoEBKE PuLvsnIzIuo ncnnm Filed March 12, 1927 nrs u .ZN VEN To?? ffwes T. Foee. A

Patented Sept. 4, 1928.

UNITED STATES PATENT OFFICE.

ERNEST T. BOEBKE, O1? ST. LOUIS, MISSOURI, ASSIGNOR T0 AEERICAH PUL'VEBIZEB i COMPANY, Ol' ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

IPULVERIZING MACHINE.

Application filed latch 12, 1927. Serial No. 174,848.

This invention relates generally to pulverizing machines.y More particularly, my invention relates to a certain new and useful improvement in machines especially adapted A 6 for reducing material by pu verizing, grinding,I crushing, and the like.

y invention has for its chief object the provision in a machine of the class stated of so-called hammer means comprising a series l0 of hammers of cylindrical bar-ring form each both rotatable with, and at the same time axially rotatable and laterally shiftable relatively to, their carrier, each hammer being also of suilicient weight and, throu h body-interru tion, cutting-away, and notc ing, equip e with a lurality of materialenga -ng aces and e ges for efficient and rapi co-operation with the grinding concave or concaves of the machine.

My invention has for a further object the improvement generally of machines of the class stated, and with such objects in view my invention resides in the novel features o form, construction, arran ent, and combination of arts hereina r described and pointed out 1n the claims.

In the accompanying drawing,

Fi re 1 is a transverse sectional view of a pu verizing machine equipped with barrirg hammers of my invention;

igure 2 is a view,'partly in elevation and partly in longitudinal section, of the machine; and

Figure 3 is a perspective'view of one of the bar-ring hammers.

Referring now more in detail and by reference characters to the drawing, which illustrates a preferred embodiment of my invention, the machine proper preferably includes a base A adapted to rest, as a 1, 1, upon a Hoor, foundation, or other place of support. Pivotallyfastened, as at 2, to base A for relative hinged or swinging movement,

is a complementing or upper casing-section C iesignates the main shaft of the machine, which is disposed longitudinally between the casing members A and B and is journaled for rotation on boxes 3 preferably adjustably arran ed on brackets 4 project mg outwardly o and preferably integral wlth or otherwise rigidly fixed to, the base The side walls of base A are formed with opposed inwardl presented flanges 5 concentric' with sha C, and seated on flanges 5, is a grinding surface or grate D comprising a series of bars 6 having depending tongues 7 and retained in suitably spaced relation as by lugs or blocks 8 preferably formed integrally on the bars 6. Bolted, as at 9, or otherwise detachably secured to the base side Walls over the ends of the series of bars 6, are arcuate-members or strips 10 for removably retaining the bars 6 upon their seat. Forming a continuation of the grate D and suitably pivotally mounted, as at e, on base A, as seen in Figures 1 and 2, is a grinding-plate or concave E adapted for swingable adjustment by means of a wedgemember F having a tongue or lug 11 fitting for movement in a slot 12 of the casing A and engaged by a bolt 13 having, in turn, engagement with spaced lugs 14, 14, on the base A and carrying a nut 15.

Mounted on and keyed to the shaft C, is a carrier comprising a suitably elongated hub 16, and integral with, or otherwise rigidly fixed to, the ends of the hub 16 and disosed for rotation in opposed recesses 19 ormed in the opposite side walls of the casing-sections A and B, as best seen in Figure 2, are end-spiders 17, 17, connected together adjlacent the free ends of the several arms t ereof by an annular series of longitudinally disposed rods 18. Di sed on the respective rods 18, are bar rin ammers G, cach of which is generally 'ofgcylindrical or tubular form and preferably of a length to extend from one end-spider 17 to the other, as seen in Figure 2, and each of which intermediate its ends is longitudinally interrupted or, cut away upon diametrically opposite sides, as. at 193,19*, whereby each bar-ring G includes end annuli 20 ccnnected integrally together by preferably dametrically opposite and correspondingly annularly or circumferentially spaced arcuate bar-portions 21, 21, whose outer peripheral surface coincides with or is disposed in the circumferential plane of the annuli 20. In turn, the bar-ring G has a longitudinal bore 22 considerably greater in diameter than the diameter of the respective rods 18,- whereby the several hammers G are not onl rotatable about the casing with the shaft but also and at the same time are each independently both axially rotatable about and laterally shiftable or yieldable relatively to its respective supporting axis or rod 18 for efficient grinding, crushing, and pulverizing co-operation with the concaves E and D; and to increase the material cutting, breaking, and crushing eiliciency of the several hammers G, the arcuate bar-portions 21 thereof are formed or provided by circumferentially spaced longitudinal surface grooves 23 and longitudinally spaced circumferential surface grooves 24 with circumferential series of preferably staggered `cutting-edges 25 and hammer-faces 26, such cutting-edges 25 and hammer-faces 26, as well as also the edges 27 and side-faces 28 of the bar-portions 2l,

functioning in the operations of the machine and in co-operation with the concaves D and E as material cutting or shredding and breaking and crushing surfaces, while the remaining peripheral surfaces of the bar-portions 21 and the peripheral surfaces of the annuli'20 function more directly as grinding or pulverizing surfaces for the so broken, crushed, or shredded material.

Provided, in the upper casing-section B and disposed preferably to one side of the shaft C and its associated barring hammers, G, is a suitable feed-opening, as at 32, one or the lower wall 33 of which is disposed obliquely inwardly and downwardly toward the hammers G and, as best seen in Figure 1, is preferably flatwise equipped with a renewable wear-plate 35, and provided in the casing-section B adjacent and under the feed-opening wall 33, for purposes short ly appearing, is a chamber or receptacle 29 normally closed atits lower end by a slidedoor 30, the chamber 29 being also separated from the interior of the hammer-casing by means of a gravity-closed counterweighted door 31.

Preferably also the arcuate wall of casingsection B, is provided on its inner face with opposed ways or grooves, as at 34, to slidably receive one or more impact-plates 36, 36, formed longitudinally with a series of transverse corrugations or depressions, as at 37, for material breaking and crushing co-operation with the hammers G, the depressions or corrugations 37 preferably progressively decreasing in de th and width from the region of the fee -openmg 32 to the lower end of the plate 36` which end, as best seen in Figure 1, is preferably concentrically dis osed immediately above the upper end of tiie concave E in approximately the plane of the axis of rotation of the main shaft C.

In use and operation, the shaft C and consequently also thev several hammers Gare caused to revolve at the desired speed by any convenient driving means, not shown. The material to be crushed, ulverized, or otherwise acted upon is intro uced into the machine through the feed-opening 32 and is delivered to the more or less rapidly revolving hammers G over the wear-plate 34. The several hammers G then function in cooperation with the concaves D and E and the plate or plates 36 to break -up and re# duce the material, in such action the various faces and edges of the several barrings G efiiciently increasing the action of the hammers, as I have before described. In such crushing, breaking, or other such operations, any tramp iron or foreign unbreakable material will be automatically thrown by the several hammers G into the receptacle 29, the gravity-door 31 yielding under the impact of the thrown material, and from such receptacle such tramp iron or other foreign material may be readily removed through the opening normally closed by the slide 30. It will also be evident that, by actuation of the nut 15, the concave E may be pivotally shifted or adjusted relatively to the hammers G as may be desired in the particular operations being carried on.

My new machine as a Whole, and especially the bar-ring hammers G, which are preferably integrally cast or otherwise constructed and are' of proper and sufficient weight, in co-operation with the grinding concaves, are exceedingly efficient in the performance of their intended functions. The hammers G may be readily manufactured and are conveniently renewably mounted upon the spiders 17 and rods 18, and it will be evident that, by reversing the position of the hammers G upon the rods 18, the opposed cutting-edges 25, 27, and faces 26, 28 of the arcuate ring-bars 21 may be interchangeably utilized and the usable life of the bar-ring hammer G correspondingly prolonged or lengthened. Preferably and as shown, the point of jointure of the base-section A and upper section B coincides approximately with the center or axial line of shaft C, so that` should re air or replacement of the shaft C or any o its associate parts ydisposed within the casing become necessary, convenient access is afforded by a mere swinging back of the upper casing-section B.

I am aware that changes in the form, construction, arrangement, and combination of the several parts of mynew machine may be made and substituted for those herein shown and described without departing from the nature and principle of my invention. y

Having thus `described vmy invention, what I claim and desire to secure by Letters Patent is: y

' 1. In a machine of the class stated, in combination `\\itli' a casing, anarcuate grinding surface Within the casing, and a carrier mounted for rotation Within the casing, of an annular seriesof cylindrical hammers supported by the carrierand rotatable both with and axially relatively to the carrier for co-operation with the grinding surface, each of said hammers includinfr spaced anniili and arcuate circumferentizilly spaced bars dis osed between and connecting the annuli an having their outer peripheral surface in the circumferential plane of the annuli.

2. In a machine of the class stated, in combination with a casing, an arcuate grindingr surface within 'the casing, and a carrier mounted for rotation within the casing, of an annular series of cylindrical hammers supported by the carrier and rotatable both with and aiiially relatively lto the carrier for co-operation` with the grinding surface, each `of said hammers including spaced annuli and arcuate circumferentially spaced bars disposed between and connecting the annuli, said bars having their outer peripheral surface in the circumferential plane of the annii'li and each havin@r a material-cutting 'edge and a radially disposed material-engaging face.

3. In a machine of the class stated, in combination with a casing s nd an arcuate grinding surface within the casing, of a carrier mounted for rotation Within the casing and including an elongated hub, end spiders on the hub, and rods disposed longitudinally of the hub and having engagement at-their ends with the arirs of the spider, and cylindrical hammers loosely disposed axially on said rods and rotatable with the rods and also axially rotatable and bodily movable inwardly and outwardly relatively fo said rods, each of said hammers having spaced annuli Whose internal diameter is greater than the diameter of said rods, and arcuate circumferentially spaced bars disposed between and connecting the annuli, each of said bars having a plurality of material-cutting edges and a plurality of radially disposed material-engaging faces.

4'. In a machine of the class stated, a casing, an annular series of hammers mounted for rotation within the casing, an arcuate grinding-plate pivotally supported at its upper end for adjustable co-operation with the hammers, and means for adjustably shifting said plate relatively to the hammers, said means including a Wedge-member. lugs on thc casingjand on the wedge-member, a threaded bolt having engagement with the lugs of the casing, and a nut on the bolt having engagement with the lug of the wedge-member.

5. In a machine of the class stated, a tubular hammer including a plurality of parallel connected annularly spaced bars, each having a side face and an arcuate outer face, each said side face being radially disposed to each said outer face for material engagement and its outer extremity providing a peripherally disposed material-cutting edge.

6. In a machine of the class stated, a tubular hammer includin a plurality of parallel connected annular y spaced bars each havin opposite side faces and an arcuate outer Iace, s aid side faces beingradially disposed to said outer faces for material engagement and their opposite outer extremities providin peripherally disposed lmaterial-cutting e ges.

7. In a machine of the class stated, a tubular hammer including end annuli and a plurality of annularly spaced bar's connecting the annuli, said bars having arcuate outer and inner faces and disposed with their outer faces in the circumferential plane of the annull.

8. In a machine of the class stated, a

tubular hammer including end annuli and a plurality of annularly-spaced bars connecting the annuli, said bars having arcuate outer and inner faces and disposed with their outer faces in the circumferential plane of the annuli, the side walls of'said bars connecting their said outer and inner faces providing radially disposed materialengaging faces and peripherally disposed material-cutting edges.

9. In a machine of the class stated, a tubular hammer including end annuli and al plurality of annularly spaced bars connecting the annuli, said bars having arcuate outer and inner faces-and disposed with their outer faces in the circumferential plane of the annuli, each of said bars bein upon its outer surface longitudinally and circumferentially grooved and thereby provided with a plurality of material-cutting edges and radially presented material-engagin faces.

10. n a machine of the class described, a. tubular hammer including end annuli and a pair of diametrically opposite bars connecting the annuli, said bars having arcuate outer and inner faces and disposed ^with their outer faces in the peripheral plane f the annuli, each of said bars being upon its' outer surface longitudinally and circumferentially grooved and thereby provided with a plurality of staggered material-cutting edges and staggered radially disposed material-engaging faces.

l1. In a machine of the class stated, a reversible tubular hammer integrally includluf;

ing end annuli and a air of diametrically opposite bars connecting the annuli, said -bars having arcuate outer and inner faces and disposed with their outer faces in the 5 eripheral plane of the annuli, each of said ars beinfy upon its Vouter surface longitudinally an circumferentially groove andthereby provided with a plurality of stag gered and'o posed material-cutting edge and staggere and opposed radially present ed mater1a1-engaging faces.

In testimony whereof, I have signed m name to this specification.

" ERNEST T. ROEBKE. 

